Revert "Dead code removal."

Alas, there are references to gpu_hang in suite_scheduler.ini,
which is causing a flood of e-mail complaints.

This reverts commit ed6c6c8ab133e04996003dbfadab046fd8fb8fc4.

Change-Id: I96dbf79288ce293e0fc7fb7c31d2c18d560c418a
Reviewed-on: https://chromium-review.googlesource.com/221699
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
44 files changed